A kind of material and preparation method for solving lost foam surface roughness

Abstract

The invention relates to a material capable of eliminating evaporative pattern surface roughness and a preparation method thereof. The material capable of eliminating evaporative pattern surface roughness comprises stearic acid, paraffin wax, water and sodium hydroxide. The preparation method of the material capable of eliminating evaporative pattern surface roughness comprises the following steps that firstly, 25% of water is poured into a container; secondly, the paraffin wax and the sodium hydroxide are sequentially added into the water after the temperature of the water reaches 30 DEG C or so; thirdly, after the paraffin wax melts, 65% of stearic acid is slowly poured into the water and stirred continuously, fire is stopped and stirring is continued until liquid becomes grey white, and pasty fluid cools and then solidifies into paste; and fourthly, the paste is scooped out of the container and stored in a sealed mode, optimally, the paste is placed into a plastic bag, and the bag opening is sealed for standby application. By means of the technical scheme, the material and the preparation method have the following beneficial effects that the gas-forming amount and slagging amount of castings are reduced, and the rate of finished casting products is increased; the material can replace Germany blue gel, so cost is lowered; the mold manufacturing period is shortened, and the surface quality of the castings is improved.

Description

technical field [0001] The invention belongs to the field of chemical materials, and in particular relates to a material for solving the problem of surface roughness of lost foam. Background technique [0002] During the processing of lost foam, due to the influence of processing parameters, moisture content of lost template materials and weather, particles are prone to drop during processing, which in turn affects the quality of castings; sandpaper is used to polish the surface in mold assembly, which has a large amount of grinding, low efficiency and It is easy to cause mold size problems; use German cold glue to repair white mold defects, increase the amount of gas generation and slag formation of castings, and lead to an increase in casting rejection rate. The above three problems directly affect the usability of molds and product quality. There is no effective way to solve the surface quality problem in production and use. Contents of the invention [0003] The prese...

AI Technical Summary

Problems solved by technology

[0002] During the processing of lost foam, due to the influence of processing parameters, moisture content of lost template materials and weather, particles are prone to drop during processing, which in turn affects the quality of castings; sandpaper is used to polish the surface in mold assembly, which has a large amount of grinding, low efficiency and It is easy to cause mold size problems; use German cold glue to repair white mold defects, increase the amount of gas generation and slag formation of castings, and lead to an increase in casting rejection rate. The above three problems directly affect the usability of molds and product quality

There is no effective way to solve the surface quality problem in production and use

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